Lake Oswego, West Linn, Tigard: An ongoing land use battle over the Lake Oswego water treatment plant was expected to boil Wednesday night, with the West Linn Planning Commission slated to vote on a proposed expansion of the plant located in a West Linn neighborhood. Instead, officials tied to a water partnership between Lake Oswego and Tigard asked the planning commission to postpone the vote, allowing project leaders time to repackage their controversial request and address concerns voiced in three hours-long public hearings held over the last month.